Finding the Fourth Proportional to 1,259.91, 1,887.57 and 673.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,259.91 : 1,887.57 = 673.47 : x
2. Step 2: Convert to fraction form
   1,259.91/1,887.57 = 673.47/x
3. Step 3: Cross multiply
   1,259.91x = 1,887.57 × 673.47
4. Step 4: Simplify right side
   1,259.91x = 1,271,221.77
5. Step 5: Solve for x
   x = 1,271,221.77/1,259.91
6. Step 6: Final answer
   x = 1,008.98